The ICD-10-CM Expert for Physicians with our hallmark features and format makes facing the challenge of accurate diagnosis coding easier. Developed specifically to meet the needs of physicians, the Optum360 code book contains the complete ICD-10-CM code set which is the cornerstone for establishing medical necessity, determining coverage, and ensuring appropriate reimbursement. Now with a new symbol in the tabular to identify codes associated with hierarchical condition categories (HCC). Supplementary appendixes available only in the expert edition include: 2018 deleted code list, pharmacology listings, Z-codes for long term use of drugs and associated drug names; and Z-codes used only as primary diagnosis.